specification submittal sheet - SupplyHouse.com
Model 420
®
a
®
Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve
company
SPECIFICATION SUBMITTAL SHEET APPLICATION Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Supplied with an integral anti-freeze relief valve to reduce the risk of valve damage under intermittent, non-seasonal freezing conditions. Designed for use under continuous pressure. Assembly shall provide protection where a potential health hazard exists.
FEATURES Sizes: 1/2"
3/4"
1"
Maximum working water pressure Maximum working water temperature Hydrostatic test pressure Threaded connections
175 PSI 140°F 350 PSI ANSI B1.20.1
Integral anti-freeze relief valve Replaceable thermoplastic modular cartridge OPTIONS (Suffixes can be combined)
STANDARDS COMPLIANCE ASSE® Listed 1020 IAPMO® Listed CSA® Certified Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California MATERIALS Main valve body Elastomers Polymers Springs
Cast Bronze ASTM B 584 Silicone (FDA Approved) Buna Nitrile (NSF Listed) Polypropylene (FDA Approved) Delrin™ (NSF Listed) Noryl™ (NSF Listed) Stainless Steel, 300 Series
B
- with full port QT ball valves (standard) XL - Lead-Free Law Compliant option available WILKINS 420 PVB 1"
ACCESSORIES Repair kit (complete) Repair kit (rubber only) Repair kit (freeze kit) Water hammer arrester (Model 1250)
A C
DIMENSIONS & WEIGHTS (do not include pkg.) DIMENSIONS (approximate)
MODEL SIZE
A
B
C
WEIGHT
in.
mm
in.
mm
in.
mm
in.
mm
lbs.
kg
1/2
15
6 3/8
162
4
102
3 5/8
92
3
1.4
3/4
20
6 3/4
172
4 1/4
108
3 13/16
97
4
1.8
1
25
7 15/16
202
4 15/16
125
4 1/2
114
5
2.3
Page 1 of 2
DOCUMENT #: REVISION: BF-420 8/12 WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com
MODEL 420 1/2”, 3/4" & 1" (STANDARD & METRIC) 10
1.9
1.26
2.52
3.78
3.15
3/4" (20mm)
35
5 0
69
1" (25mm)
0
10
20
30
40
50
60
PRESSURE LOSS (kpa)
PRESSURE LOSS (PSIG)
FLOW RATES (l/s)
0.63
FLOW RATES (GPM)
Rated Flow (Established by approval agencies)
TYPICAL INSTALLATION Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be installed in accordance with the manufacturers’ instructions and the latest edition of the Uniform Plumbing Code. The assembly shall be mounted at a minimum of 12” (305mm) above the highest piping or outlet downstream of the device. Install with adequate drain and sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged. A pressure vacuum breaker cannot be installed where back-pressure could occur or where spillage of water from vent could cause damage.
Capacity thru Schedule 40 Pipe Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec 1/8" 1 1 2 3 1/4" 2 2 3 5 3/8" 3 4 6 9 1/2 5 7 9 14 3/4" 8 12 17 25 1" 13 20 27 40 1 1/4" 23 35 47 70 1 1/2" 32 48 63 95 2" 52 78 105 167
12" MIN. ABOVE HIGHEST OUTLET PIPING
WILKINS 420 PVB 1”
WILKINS 420 PVB 1”
12" MIN. ABOVE HIGHEST OUTLET
DRAIN
DIRECTION OF FLOW
OUTDOOR INSTALLATION
DIRECTION OF FLOW
INDOOR INSTALLATION
SPECIFICATIONS The Pressure Vacuum Breaker shall be ASSE® Listed1020, and supplied with full port ball valves. The main body shall be bronze (ASTM B 584), the loaded-air inlet shall use a silicone elastomer spring and seat disc. The assembly shall include an integral relief valve. The entire assembly shall be accessible for maintenance and testing without removing the device from the line. The Pressure Vacuum Breaker shall be a WILKINS Model 420.
WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com
Page 2 of 2
®
a
®
Pressure Vacuum Breaker Assembly with Integral Anti-Freeze Relief Valve
company
SPECIFICATION SUBMITTAL SHEET APPLICATION Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Supplied with an integral anti-freeze relief valve to reduce the risk of valve damage under intermittent, non-seasonal freezing conditions. Designed for use under continuous pressure. Assembly shall provide protection where a potential health hazard exists.
FEATURES Sizes: 1/2"
3/4"
1"
Maximum working water pressure Maximum working water temperature Hydrostatic test pressure Threaded connections
175 PSI 140°F 350 PSI ANSI B1.20.1
Integral anti-freeze relief valve Replaceable thermoplastic modular cartridge OPTIONS (Suffixes can be combined)
STANDARDS COMPLIANCE ASSE® Listed 1020 IAPMO® Listed CSA® Certified Approved by the Foundation for Cross Connection Control and Hydraulic Research at the University of Southern California MATERIALS Main valve body Elastomers Polymers Springs
Cast Bronze ASTM B 584 Silicone (FDA Approved) Buna Nitrile (NSF Listed) Polypropylene (FDA Approved) Delrin™ (NSF Listed) Noryl™ (NSF Listed) Stainless Steel, 300 Series
B
- with full port QT ball valves (standard) XL - Lead-Free Law Compliant option available WILKINS 420 PVB 1"
ACCESSORIES Repair kit (complete) Repair kit (rubber only) Repair kit (freeze kit) Water hammer arrester (Model 1250)
A C
DIMENSIONS & WEIGHTS (do not include pkg.) DIMENSIONS (approximate)
MODEL SIZE
A
B
C
WEIGHT
in.
mm
in.
mm
in.
mm
in.
mm
lbs.
kg
1/2
15
6 3/8
162
4
102
3 5/8
92
3
1.4
3/4
20
6 3/4
172
4 1/4
108
3 13/16
97
4
1.8
1
25
7 15/16
202
4 15/16
125
4 1/2
114
5
2.3
Page 1 of 2
DOCUMENT #: REVISION: BF-420 8/12 WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com
MODEL 420 1/2”, 3/4" & 1" (STANDARD & METRIC) 10
1.9
1.26
2.52
3.78
3.15
3/4" (20mm)
35
5 0
69
1" (25mm)
0
10
20
30
40
50
60
PRESSURE LOSS (kpa)
PRESSURE LOSS (PSIG)
FLOW RATES (l/s)
0.63
FLOW RATES (GPM)
Rated Flow (Established by approval agencies)
TYPICAL INSTALLATION Local codes shall govern installation requirements. Unless otherwise specified, the assembly shall be installed in accordance with the manufacturers’ instructions and the latest edition of the Uniform Plumbing Code. The assembly shall be mounted at a minimum of 12” (305mm) above the highest piping or outlet downstream of the device. Install with adequate drain and sufficient side clearance for testing and maintenance. The installation shall be made so that no part of the unit can be submerged. A pressure vacuum breaker cannot be installed where back-pressure could occur or where spillage of water from vent could cause damage.
Capacity thru Schedule 40 Pipe Pipe size 5 ft/sec 7.5 ft/sec 10 ft/sec 15 ft/sec 1/8" 1 1 2 3 1/4" 2 2 3 5 3/8" 3 4 6 9 1/2 5 7 9 14 3/4" 8 12 17 25 1" 13 20 27 40 1 1/4" 23 35 47 70 1 1/2" 32 48 63 95 2" 52 78 105 167
12" MIN. ABOVE HIGHEST OUTLET PIPING
WILKINS 420 PVB 1”
WILKINS 420 PVB 1”
12" MIN. ABOVE HIGHEST OUTLET
DRAIN
DIRECTION OF FLOW
OUTDOOR INSTALLATION
DIRECTION OF FLOW
INDOOR INSTALLATION
SPECIFICATIONS The Pressure Vacuum Breaker shall be ASSE® Listed1020, and supplied with full port ball valves. The main body shall be bronze (ASTM B 584), the loaded-air inlet shall use a silicone elastomer spring and seat disc. The assembly shall include an integral relief valve. The entire assembly shall be accessible for maintenance and testing without removing the device from the line. The Pressure Vacuum Breaker shall be a WILKINS Model 420.
WILKINS a Zurn company, 1747 Commerce Way, Paso Robles, CA 93446 Phone:805-238-7100 Fax:805-238-5766 In Canada: ZURN INDUSTRIES LIMITED, 3544 Nashua Dr., Mississauga, Ontario L4V 1L2 Phone:905-405-8272 Fax:905-405-1292 Product Support Help Line: 877-BACKFLOW (877-222-5356) • Website: http://www.zurn.com
Page 2 of 2
